// light up active navigation elements

var urlNoQueryString = location.href.replace(location.search,"");

if(document.getElementById("side-nav-body")) {
  var navEls = document.getElementById("side-nav-body").getElementsByTagName("a");
  for (var i=0; i<navEls.length; i++) {
    if(navEls[i].href==location.href || navEls[i].href==urlNoQueryString) {
      navEls[i].className+=" on";
    }
  }
}